Free Idaho CDL Air Brakes Test 2024

Your knowledge of air brakes will be thoroughly tested by anwering these review questions, which will bring you one step close to a CDL that allows you drive vehicles with air brakes in the state of Idaho. These 30 multiple-choice quetions, which closely resemble the types of questions you will find on your DMV exam, are based on information from the Idaho Commercial Driver’s License Manual. Study and practice as often as necessary to achieve the score that you want, and to become a safer driver. The explanation included with each question will also help with this process. Keep practicing, and good luck!

Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
Triple-checked for accuracy

What you need to know

9 min to complete

Available in EN and ES

Verified by Steven Litvintchouk, M.S., Chief Educational Researcher, Member of ACES. See our detailed commitment to accuracy and quality in our practice tests.

What to expect on the actual ID DMV exam

questions

correct answers to pass

80%

passing score

Helpful links

ID DMV website

List of questions (classic view)

When should you drain your air tanks?
The tractor protection valve
Under which conditions are front wheel brakes good?
The purpose of a supply pressure gauge is
Which of the following is NOT part of the air brake system?
At what measurement is the safety valve USUALLY set to open?
What is the best way to test if your vehicle's spring brakes come on automatically?
Why must you study air brakes in the state of Idaho?
Which of the following is NOT part of the drum brake?
How can you tell if your vehicle is equipped with an anti-lock braking system (ABS)?
Which of the following should you do before leaving your vehicle unattended?
Which vehicles must have low air pressure warning signals?
How do brakes work on a long, steep downgrade?
Which of the following is NOT part of the braking process when driving a tractor-trailer combination vehicle with an anti-lock braking system (ABS)?
What is the best way to test your vehicle's low air pressure warning signal?
When should you use the parking brake?
Which of the following are true about a dual air brake system?
Which of the following will be true about your brake function if your anti-lock braking system (ABS) fails?
If the air tanks are not drained,
An anti-lock braking system (ABS)
How would you check your truck's slack adjusters?
After the initial drop, the maximum acceptable leakage rates per minute are
Slack adjusters are
Spring brakes are
Which of the following can cause brakes to fail or fade?
The low air pressure warning signal will come on before the pressure in the air tanks falls below
A low pressure warning signal is required on
All vehicles equipped with air brakes have
With air brake-equipped vehicles, the parking brakes should be used
The use of air brakes on a downgrade is only a supplement to the

Are you in another state?

Alabama: Test 1 / Test 2
Alaska: Test 1 / Test 2
Arizona: Test 1 / Test 2
Arkansas: Test 1 / Test 2
California: Test 1 / Test 2
Colorado: Test 1 / Test 2
Connecticut: Test 1 / Test 2
Delaware: Test 1 / Test 2
District of Columbia: Test 1 / Test 2
Florida: Test 1 / Test 2
Georgia: Test 1 / Test 2
Hawaii: Test 1 / Test 2
Idaho: Test 1 / Test 2
Illinois: Test 1 / Test 2
Indiana: Test 1 / Test 2
Iowa: Test 1 / Test 2
Kansas: Test 1 / Test 2

Kentucky: Test 1 / Test 2
Louisiana: Test 1 / Test 2
Maine: Test 1 / Test 2
Maryland: Test 1 / Test 2
Massachusetts: Test 1 / Test 2
Michigan: Test 1 / Test 2
Minnesota: Test 1 / Test 2
Mississippi: Test 1 / Test 2
Missouri: Test 1 / Test 2
Montana: Test 1 / Test 2
Nebraska: Test 1 / Test 2
Nevada: Test 1 / Test 2
New Hampshire: Test 1 / Test 2
New Jersey: Test 1 / Test 2
New Mexico: Test 1 / Test 2
New York: Test 1 / Test 2
North Carolina: Test 1 / Test 2

North Dakota: Test 1 / Test 2
Ohio: Test 1 / Test 2
Oklahoma: Test 1 / Test 2
Oregon: Test 1 / Test 2
Pennsylvania: Test 1 / Test 2
Rhode Island: Test 1 / Test 2
South Carolina: Test 1 / Test 2
South Dakota: Test 1 / Test 2
Tennessee: Test 1 / Test 2
Texas: Test 1 / Test 2
Utah: Test 1 / Test 2
Vermont: Test 1 / Test 2
Virginia: Test 1 / Test 2
Washington: Test 1 / Test 2
West Virginia: Test 1 / Test 2
Wisconsin: Test 1 / Test 2
Wyoming: Test 1 / Test 2

Your go-to, trusted source

Experience the Driving-Tests difference

Since our foundation in 2010, Driving-Tests.org has led the way in online driver's education, with over a decade of experience. Our dedicated experts, bringing together more than 50 years of collective expertise, have established us as the largest non-governmental organization in the U.S. solely focused on driver education. We go beyond the official manuals, offering unique interactive experiences and support like audio guides and an AI Assistant, to cater to different learning styles and needs.

Helping hundreds of thousands to ace their tests, our resources have earned a 4.7-star rating from over 14,500 reviews. Our goal is to make your path to becoming a confident driver as straightforward and effective as possible.

Our commitment to accuracy and quality in our practice tests

Explore our rigorous, multi-tiered verification process that ensures each question mirrors the official manual for unparalleled accuracy.

Written by Andrei Zakhareuski Updated over a week ago

At Driving-Tests.org, we understand the importance of reliable and accurate practice tests to help you prepare for your DMV exam. That's why we've developed a meticulous process to create and continually update our practice questions, ensuring they reflect the most current driving laws and regulations.

Here's an inside look at how we maintain the highest quality in our practice tests.

Content Creation and Verification Process

Alignment with Official Manuals:
Every question we develop is based on the most recent version of each state's official driving manual. Our team regularly monitors each state DMV's website for the latest updates to ensure our practice tests are always aligned with the most current information.
Community Feedback Integration:
We leverage feedback from our vast community of users to understand which topics are most frequently tested. This helps us focus on the areas that are most relevant and beneficial for your preparation.
Expert Content Creation:
Our in-house editor, Steven, who has extensive experience in driver education, crafts each question with precision. He conducts a thorough review of each question against the official manuals to ensure accuracy.
Rigorous Review Process:
Once Steven has finalized a set of questions, our team conducts a joint review session. This second level of scrutiny involves content accuracy, proofreading, and fact-checking to eliminate any errors.
User Feedback Mechanism:
After a question goes live on our site, we keep the lines of communication open. Each question features a feedback button, inviting users to report any issues or errors. This continuous feedback loop allows us to address and rectify any concerns promptly.
Responsive Updates:
In line with our commitment to accuracy, we quickly update our practice questions to reflect any changes in the DMV manuals. Additionally, we update the free electronic copy of the state's driver's license manuals on our site, typically within a few days after the DMV publishes them.

Our thorough quality control process ensures that you have access to practice tests that are as accurate and up-to-date as possible. We believe in the power of well-prepared drivers and are dedicated to providing you with the best study tools to help you succeed on your DMV exam.

General
1234	Select answer
enter	Confirm/Next question
n	Next question
p	Previous question
c	Current question
ta	Answer popularity
tf	Font size

VoiceOver
tv	VoiceOver ON/OFF
v	Start/Stop VoiceOver
e	Start/Stop Explanation VoiceOver
Review Mode
←	Previous question
→	Next question
c	Current question